The gaffe

Please note that the historic data had a bug which is fixed and
the correct value highlighted below. On the plus side, this means
that the delta is not as large as I feared. On the negative side,
the gap between the Squeeze and Wheezy release cycles keeps
widening slowly but steadily.

The gist

Affecting wheezy:
323 That's the number we need to get down to zero
before the release. They can be split in two big categories:

Affecting wheezy and unstable:
190 Those need someone to find a fix, or to finish the
work to upload a fix to unstable:

38 bugs are tagged 'patch'. Please help by reviewing
the patches, and (if you are a DD) by uploading them.

6 bugs are marked as done, but still affect unstable.
This can happen due to missing builds on some architectures, for
example. Help investigate!

151 bugs are neither tagged patch, nor marked done.
Help make a first step towards resolution!

Affecting wheezy only:
133 Those are already fixed in unstable, but the fix
still needs to migrate to wheezy. You can help by submitting
unblock requests for fixed packages, by investigating why packages
do not migrate, or by reviewing submitted unblock requests.